Pencil sharpener



Aug. 22, 1950 F. scHR PENCIL SHARPENER Filed sept. so. 194s EIIPM.

INVENTOR FRANZ Schn a.. i f

7M,W 776m 'l Patented Aug. 22, 1950 UNITED STATES PATENT FFICE PENCL SHARPENER Franz Schar, Thun, Switzerland Application September 30, 1948,1SerialNo. 51,876 In Switzerland yOctober 7, 1947 1 (claim. 1

This invention relates to pencil Sharpeners having a stop for determining the length of the point. Sharpeners of this type are already known in the art. However, up till now, these stops had no influence whatever on the shape of the lead point and therefore the pencil points obtained by these known Sharpeners always required a nishing cut to be taken for giving them the shape desired for use which, as is well known is not identical with the conical shape obtained by means of the sharpener blades.

The pencil sharpener according to the invention is characterised in that the stop is formed by a lead iile.

By preference, this lead iile may be mounted rotatably around an axis parallel to the pencil guide. Furthermore, the lead file may be arranged to be axially adjusted.

Other objects and features will be apparent as the following description proceeds, reference being had to the accompanying drawing illustrating by way of example one embodiment of the invention and wherein Fig. 1 is a side view of the pencil Sharpener, partly in section, and v Fig. 2 is front view thereof.

As in devices of known type, the pencil sharpener comprises a Sharpener body l in the middle portion of which a pencil guide 2 is provided along the one side of which the blade 3 is mounted. At the side of the guide 2 opposite to the blade 3 a pin 4 is slidably arranged in the body I parallel to the guide 2. To the end of the pin l projecting from the Sharpener body a discshaped le 5 for iinishing the lead point of a pencil is fixed. This lead file 5 has a fluted rim 6 and a conical iile surface 1. However, this le surface l may have any other shape if desired for special purposes. The circular front face of the iile, as shown in Fig. 2, may serve as a second le surface which neither forms a stop nor can it be used for filing leads of pencils when guided in the guide 2 during sharpening; this second circular file surface can only be used for taking the finishing cut on other leads. A set screw 8 serves the purpose of holding fast or locking the pin 4 together with the lead Iile 6 in a certain position. An adjusting screw 9 screwed into the body l lies coaxial to the pin 4 and contacts this latter by one of its ends, so that on turning the screw 9 the pin 4 with the lead iile 5 may be axially adjusted in one direction.

As soon as, on sharpening, the lead of the pencil to be sharpened has been denuded of the Wooden envelope up to a certain length, the fore end of the lead strikes against the surface 1 of the lead le 5, thereby determining the length of the lead point and giving this latter at the same time the shape desired by a filing operation of the surface 'l'. Should it be desired to have a longer lead point, the distance between the end of the body l and the lead le 5 can be increased by turning the adjusting screw 9. Should another shape be given to the lead point, the lead le 5 and the pin il may be removed and replaced by another iile having the new shape desired for the lead point.

While have described and illustrated one embodiment of my invention, I do not wish to unnecessarily limit the scope of this invention, but reserve the right to make such modifications and rearrangements as may come within the purview of the accompanying claim.

What I claim is:

In a pencil Sharpener, a body member comprising a pencil guide hole in its middle portion, a blade fixed to said body member at the one side of said pencil guide hole, a pin slidably and rotatably mounted on said body member at the side of said pencil guide hole opposite to said blade, one end of said pin projecting from said body member, a disk-shaped iile fixed to the projecting end of said pin and provided with a conical iile surface lying in front of said pencil guide hole to serve as a stop for the pencil and las a tool to give the lead point of the pencil the shape desired, a set screw screwed into said body member radially with regard to the axis of said pin toI lock the latter in position, and an adjusting screw screwed into said body member coaxially to said pin and in engagement with said pin to allow axial adjustment of said le surface in one direction.

FRANZ sCHR.

REFERENCES CITED The following references are of record in the iile of this patent:

UNITED STATES PATENTS Number Name Date 273,621 Small Mar. 6, 1883 510,981 Massey Dec. 19, 1893 2,438,628 Yerkes Mar. 30, 1948 FOREIGN PATENTS Number Country Date 411,723 Great Britain June 14, 1934 461,925 Germany July 3, 1928 

